Paging design with short message indicator

ABSTRACT

Certain aspects of the present disclosure provide techniques communicating in a wireless network. In one embodiment, a method includes monitoring for a paging downlink control channel comprising downlink control information, wherein the downlink control information comprises a first short message; processing the first short message; determining if the control information further comprises scheduling information; processing the scheduling information if the downlink control information comprises scheduling information and the UE is not in a connected state; and ignoring the scheduling information if the downlink control information comprises scheduling information and the UE is in a connected state.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application claims the benefit of U.S. Provisional PatentApplication No. 62/674,402, filed May 21, 2018, and U.S. ProvisionalPatent Application No. 62/670,549, filed May 11, 2018, the contents ofboth of which are incorporated herein by reference in their entirety.

INTRODUCTION Field of the Disclosure

Aspects of the present disclosure relate to wireless communications, andmore particularly, to techniques for providing a paging design with ashort message indicator.

DESCRIPTION OF RELATED ART

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,broadcasts, etc. These wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, etc.). Examples of such multiple-access systems include3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE)systems, LTE Advanced (LTE-A) systems, code division multiple access(CDMA) systems, time division multiple access (TDMA) systems, frequencydivision multiple access (FDMA) systems, orthogonal frequency divisionmultiple access (OFDMA) systems, single-carrier frequency divisionmultiple access (SC-FDMA) systems, and time division synchronous codedivision multiple access (TD-SCDMA) systems, to name a few.

In some examples, a wireless multiple-access communication system mayinclude a number of base stations (BSs), which are each capable ofsimultaneously supporting communication for multiple communicationdevices, otherwise known as user equipments (UEs). In an LTE or LTE-Anetwork, a set of one or more base stations may define an eNodeB (eNB).In other examples (e.g., in a next generation, a new radio (NR), or 5Gnetwork), a wireless multiple access communication system may include anumber of distributed units (DUs) (e.g., edge units (EUs), edge nodes(ENs), radio heads (RHs), smart radio heads (SRHs), transmissionreception points (TRPs), etc.) in communication with a number of centralunits (CUs) (e.g., central nodes (CNs), access node controllers (ANCs),etc.), where a set of one or more distributed units, in communicationwith a central unit, may define an access node (e.g., which may bereferred to as a base station, 5G NB, next generation NodeB (gNB orgNodeB), TRP, etc.). A base station or distributed unit may communicatewith a set of UEs on downlink channels (e.g., for transmissions from abase station or to a UE) and uplink channels (e.g., for transmissionsfrom a UE to a base station or distributed unit).

These multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent wireless devices to communicate on a municipal, national,regional, and even global level. New Radio (NR) (e.g., 5G) is an exampleof an emerging telecommunication standard. NR is a set of enhancementsto the LTE mobile standard promulgated by 3GPP. It is designed to bettersupport mobile broadband Internet access by improving spectralefficiency, lowering costs, improving services, making use of newspectrum, and better integrating with other open standards using OFDMAwith a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL).To these ends, NR supports beamforming, multiple-input multiple-output(MIMO) antenna technology, and carrier aggregation.

However, as the demand for mobile broadband access continues toincrease, there exists a need for further improvements in NR and LTEtechnology. Preferably, these improvements should be applicable to othermulti-access technologies and the telecommunication standards thatemploy these technologies.

BRIEF SUMMARY

The systems, methods, and devices of the disclosure each have severalaspects, no single one of which is solely responsible for its desirableattributes. Without limiting the scope of this disclosure as expressedby the claims which follow, some features will now be discussed briefly.After considering this discussion, and particularly after reading thesection entitled “Detailed Description” one will understand how thefeatures of this disclosure provide advantages that include improvedcommunications between access points and stations in a wireless network.

Certain aspects provide a method for wireless communication by a userequipment (UE), including: monitoring for a paging downlink controlchannel comprising downlink control information, wherein the downlinkcontrol information comprises a first short message; processing thefirst short message; determining if the control information furthercomprises scheduling information; processing the scheduling informationif the downlink control information comprises scheduling information andthe UE is not in a connected state; and ignoring the schedulinginformation if the downlink control information comprises schedulinginformation and the UE is in a connected state.

Certain aspects provide a method for wireless communication by anetwork, including: transmitting a paging downlink control channelcomprising downlink control information, wherein: the downlink controlinformation comprises a first downlink control information message and asecond downlink control information message, the first downlink controlinformation message comprises a first short message, and the seconddownlink control information message comprises the schedulinginformation and a second short message.

To the accomplishment of the foregoing and related ends, the one or moreaspects comprise the features hereinafter fully described andparticularly pointed out in the claims. The following description andthe appended drawings set forth in detail certain illustrative featuresof the one or more aspects. These features are indicative, however, ofbut a few of the various ways in which the principles of various aspectsmay be employed.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above-recited features of the presentdisclosure can be understood in detail, a more particular description,briefly summarized above, may be had by reference to aspects, some ofwhich are illustrated in the drawings. It is to be noted, however, thatthe appended drawings illustrate only certain typical aspects of thisdisclosure and are therefore not to be considered limiting of its scope,for the description may admit to other equally effective aspects.

FIG. 1 is a block diagram conceptually illustrating an exampletelecommunications system, in accordance with certain aspects of thepresent disclosure.

FIG. 2 is a block diagram illustrating an example logical architectureof a distributed radio access network (RAN), in accordance with certainaspects of the present disclosure.

FIG. 3 is a diagram illustrating an example physical architecture of adistributed RAN, in accordance with certain aspects of the presentdisclosure.

FIG. 4 is a block diagram conceptually illustrating a design of anexample base station (BS) and user equipment (UE), in accordance withcertain aspects of the present disclosure.

FIG. 5 is a diagram showing examples for implementing a communicationprotocol stack, in accordance with certain aspects of the presentdisclosure.

FIG. 6 illustrates an example of a frame format for a new radio (NR)system, in accordance with certain aspects of the present disclosure.

FIG. 7 illustrates example operations for wireless communications by auser equipment (UE), in accordance with aspects of the presentdisclosure.

FIG. 8 illustrates example operations for wireless communications by anetwork entity, in accordance with aspects of the present disclosure.

FIG. 9 illustrates a communications device that may include variouscomponents configured to perform operations for the techniques describedherein in accordance with aspects of the present disclosure.

FIG. 10 illustrates a communications device that may include variouscomponents configured to perform operations for the techniques describedherein in accordance with aspects of the present disclosure.

To facilitate understanding, identical reference numerals have beenused, where possible, to designate identical elements that are common tothe figures. It is contemplated that elements disclosed in one aspectmay be beneficially utilized on other aspects without specificrecitation.

DETAILED DESCRIPTION

Aspects of the present disclosure provide apparatus, methods, processingsystems, and computer readable mediums for providing a paging with ashort message indicator.

The following description provides examples, and is not limiting of thescope, applicability, or examples set forth in the claims. Changes maybe made in the function and arrangement of elements discussed withoutdeparting from the scope of the disclosure. Various examples may omit,substitute, or add various procedures or components as appropriate. Forinstance, the methods described may be performed in an order differentfrom that described, and various steps may be added, omitted, orcombined. Also, features described with respect to some examples may becombined in some other examples. For example, an apparatus may beimplemented or a method may be practiced using any number of the aspectsset forth herein. In addition, the scope of the disclosure is intendedto cover such an apparatus or method which is practiced using otherstructure, functionality, or structure and functionality in addition to,or other than, the various aspects of the disclosure set forth herein.It should be understood that any aspect of the disclosure disclosedherein may be embodied by one or more elements of a claim. The word“exemplary” is used herein to mean “serving as an example, instance, orillustration.” Any aspect described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otheraspects.

The techniques described herein may be used for various wirelesscommunication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA,SC-FDMA and other networks. The terms “network” and “system” are oftenused interchangeably. A CDMA network may implement a radio technologysuch as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRAincludes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implementa radio technology such as Global System for Mobile Communications(GSM). An OFDMA network may implement a radio technology such as NR(e.g. 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRAand E-UTRA are part of Universal Mobile Telecommunication System (UMTS).

New Radio (NR) is an emerging wireless communications technology underdevelopment in conjunction with the 5G Technology Forum (5GTF). 3GPPLong Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTSthat use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described indocuments from an organization named “3rd Generation PartnershipProject” (3GPP). cdma2000 and UMB are described in documents from anorganization named “3rd Generation Partnership Project 2” (3GPP2). Thetechniques described herein may be used for the wireless networks andradio technologies mentioned above as well as other wireless networksand radio technologies. For clarity, while aspects may be describedherein using terminology commonly associated with 3G and/or 4G wirelesstechnologies, aspects of the present disclosure can be applied in othergeneration-based communication systems, such as 5G and later, includingNR technologies.

New radio (NR) access (e.g., 5G technology) may support various wirelesscommunication services, such as enhanced mobile broadband (eMBB)targeting wide bandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW)targeting high carrier frequency (e.g., 25 GHz or beyond), massivemachine type communications MTC (mMTC) targeting non-backward compatibleMTC techniques, and/or mission critical targeting ultra-reliablelow-latency communications (URLLC). These services may include latencyand reliability requirements. These services may also have differenttransmission time intervals (TTI) to meet respective quality of service(QoS) requirements. In addition, these services may co-exist in the samesubframe.

Example Wireless Communications System

FIG. 1 illustrates an example wireless communication network 100 inwhich aspects of the present disclosure may be performed. For example,the wireless communication network 100 may be a New Radio (NR) or 5Gnetwork.

As illustrated in FIG. 1, the wireless network 100 may include a numberof base stations (BSs) 110 and other network entities. A BS may be astation that communicates with user equipments (UEs). Each BS 110 mayprovide communication coverage for a particular geographic area. In3GPP, the term “cell” can refer to a coverage area of a Node B (NB)and/or a Node B subsystem serving this coverage area, depending on thecontext in which the term is used. In NR systems, the term “cell” andnext generation NodeB (gNB), new radio base station (NR BS), 5G NB,access point (AP), or transmission reception point (TRP) may beinterchangeable. In some examples, a cell may not necessarily bestationary, and the geographic area of the cell may move according tothe location of a mobile BS. In some examples, the base stations may beinterconnected to one another and/or to one or more other base stationsor network nodes (not shown) in wireless communication network 100through various types of backhaul interfaces, such as a direct physicalconnection, a wireless connection, a virtual network, or the like usingany suitable transport network.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular radioaccess technology (RAT) and may operate on one or more frequencies. ARAT may also be referred to as a radio technology, an air interface,etc. A frequency may also be referred to as a carrier, a subcarrier, afrequency channel, a tone, a subband, etc. Each frequency may support asingle RAT in a given geographic area in order to avoid interferencebetween wireless networks of different RATs. In some cases, NR or 5G RATnetworks may be deployed.

A base station (BS) may provide communication coverage for a macro cell,a pico cell, a femto cell, and/or other types of cells. A macro cell maycover a relatively large geographic area (e.g., several kilometers inradius) and may allow unrestricted access by UEs with servicesubscription. A pico cell may cover a relatively small geographic areaand may allow unrestricted access by UEs with service subscription. Afemto cell may cover a relatively small geographic area (e.g., a home)and may allow restricted access by UEs having an association with thefemto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for usersin the home, etc.). A BS for a macro cell may be referred to as a macroBS. A BS for a pico cell may be referred to as a pico BS. A BS for afemto cell may be referred to as a femto BS or a home BS. In the exampleshown in FIG. 1, the BSs 110 a, 110 b and 110 c may be macro BSs for themacro cells 102 a, 102 b and 102 c, respectively. The BS 110 x may be apico BS for a pico cell 102 x. The BSs 110 y and 110 z may be femto BSsfor the femto cells 102 y and 102 z, respectively. A BS may support oneor multiple (e.g., three) cells.

Wireless communication network 100 may also include relay stations. Arelay station is a station that receives a transmission of data and/orother information from an upstream station (e.g., a BS or a UE) andsends a transmission of the data and/or other information to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that relays transmissions for other UEs. In the example shown in FIG.1, a relay station 110 r may communicate with the BS 110 a and a UE 120r in order to facilitate communication between the BS 110 a and the UE120 r. A relay station may also be referred to as a relay BS, a relay,etc.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, e.g., macro BS, pico BS, femto BS, relays, etc. Thesedifferent types of BSs may have different transmit power levels,different coverage areas, and different impact on interference in thewireless network 100. For example, macro BS may have a high transmitpower level (e.g., 20 Watts) whereas pico BS, femto BS, and relays mayhave a lower transmit power level (e.g., 1 Watt).

Wireless communication network 100 may support synchronous orasynchronous operation. For synchronous operation, the BSs may havesimilar frame timing, and transmissions from different BSs may beapproximately aligned in time. For asynchronous operation, the BSs mayhave different frame timing, and transmissions from different BSs maynot be aligned in time. The techniques described herein may be used forboth synchronous and asynchronous operation.

A network controller 130 may couple to a set of BSs and providecoordination and control for these BSs. The network controller 130 maycommunicate with the BSs 110 via a backhaul. The BSs 110 may alsocommunicate with one another (e.g., directly or indirectly) via wirelessor wireline backhaul.

The UEs 120 (e.g., 120 x, 120 y, etc.) may be dispersed throughout thewireless network 100, and each UE may be stationary or mobile. A UE mayalso be referred to as a mobile station, a terminal, an access terminal,a subscriber unit, a station, a Customer Premises Equipment (CPE), acellular phone, a smart phone, a personal digital assistant (PDA), awireless modem, a wireless communication device, a handheld device, alaptop computer, a cordless phone, a wireless local loop (WLL) station,a tablet computer, a camera, a gaming device, a netbook, a smartbook, anultrabook, an appliance, a medical device or medical equipment, abiometric sensor/device, a wearable device such as a smart watch, smartclothing, smart glasses, a smart wrist band, smart jewelry (e.g., asmart ring, a smart bracelet, etc.), an entertainment device (e.g., amusic device, a video device, a satellite radio, etc.), a vehicularcomponent or sensor, a smart meter/sensor, industrial manufacturingequipment, a global positioning system device, or any other suitabledevice that is configured to communicate via a wireless or wired medium.Some UEs may be considered machine-type communication (MTC) devices orevolved MTC (eMTC) devices. MTC and eMTC UEs include, for example,robots, drones, remote devices, sensors, meters, monitors, locationtags, etc., that may communicate with a BS, another device (e.g., remotedevice), or some other entity. A wireless node may provide, for example,connectivity for or to a network (e.g., a wide area network such asInternet or a cellular network) via a wired or wireless communicationlink. Some UEs may be considered Internet-of-Things (IoT) devices, whichmay be narrowband IoT (NB-IoT) devices.

Certain wireless networks (e.g., LTE) utilize orthogonal frequencydivision multiplexing (OFDM) on the downlink and single-carrierfrequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDMpartition the system bandwidth into multiple (K) orthogonal subcarriers,which are also commonly referred to as tones, bins, etc. Each subcarriermay be modulated with data. In general, modulation symbols are sent inthe frequency domain with OFDM and in the time domain with SC-FDM. Thespacing between adjacent subcarriers may be fixed, and the total numberof subcarriers (K) may be dependent on the system bandwidth. Forexample, the spacing of the subcarriers may be 15 kHz and the minimumresource allocation (called a “resource block” (RB)) may be 12subcarriers (or 180 kHz). Consequently, the nominal Fast FourierTransfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 forsystem bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz),respectively. The system bandwidth may also be partitioned intosubbands. For example, a subband may cover 1.08 MHz (i.e., 6 resourceblocks), and there may be 1, 2, 4, 8, or 16 subbands for systembandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.

While aspects of the examples described herein may be associated withLTE technologies, aspects of the present disclosure may be applicablewith other wireless communications systems, such as NR. NR may utilize01-DM with a CP on the uplink and downlink and include support forhalf-duplex operation using TDD. Beamforming may be supported and beamdirection may be dynamically configured. MIMO transmissions withprecoding may also be supported. MIMO configurations in the DL maysupport up to 8 transmit antennas with multi-layer DL transmissions upto 8 streams and up to 2 streams per UE. Multi-layer transmissions withup to 2 streams per UE may be supported. Aggregation of multiple cellsmay be supported with up to 8 serving cells.

In some examples, access to the air interface may be scheduled, whereina. A scheduling entity (e.g., a base station) allocates resources forcommunication among some or all devices and equipment within its servicearea or cell. The scheduling entity may be responsible for scheduling,assigning, reconfiguring, and releasing resources for one or moresubordinate entities. That is, for scheduled communication, subordinateentities utilize resources allocated by the scheduling entity. Basestations are not the only entities that may function as a schedulingentity. In some examples, a UE may function as a scheduling entity andmay schedule resources for one or more subordinate entities (e.g., oneor more other UEs), and the other UEs may utilize the resourcesscheduled by the UE for wireless communication. In some examples, a UEmay function as a scheduling entity in a peer-to-peer (P2P) network,and/or in a mesh network. In a mesh network example, UEs may communicatedirectly with one another in addition to communicating with a schedulingentity.

In FIG. 1, a solid line with double arrows indicates desiredtransmissions between a UE and a serving BS, which is a BS designated toserve the UE on the downlink and/or uplink. A finely dashed line withdouble arrows indicates interfering transmissions between a UE and a BS.

FIG. 2 illustrates an example logical architecture of a distributedRadio Access Network (RAN) 200, which may be implemented in the wirelesscommunication network 100 illustrated in FIG. 1. A 5G access node 206may include an access node controller (ANC) 202. ANC 202 may be acentral unit (CU) of the distributed RAN 200. The backhaul interface tothe Next Generation Core Network (NG-CN) 204 may terminate at ANC 202.The backhaul interface to neighboring next generation access Nodes(NG-ANs) 210 may terminate at ANC 202. ANC 202 may include one or moretransmission reception points (TRPs) 208 (e.g., cells, BSs, gNBs, etc.).

The TRPs 208 may be a distributed unit (DU). TRPs 208 may be connectedto a single ANC (e.g., ANC 202) or more than one ANC (not illustrated).For example, for RAN sharing, radio as a service (RaaS), and servicespecific AND deployments, TRPs 208 may be connected to more than oneANC. TRPs 208 may each include one or more antenna ports. TRPs 208 maybe configured to individually (e.g., dynamic selection) or jointly(e.g., joint transmission) serve traffic to a UE.

The logical architecture of distributed RAN 200 may support fronthaulingsolutions across different deployment types. For example, the logicalarchitecture may be based on transmit network capabilities (e.g.,bandwidth, latency, and/or jitter).

The logical architecture of distributed RAN 200 may share featuresand/or components with LTE. For example, next generation access node(NG-AN) 210 may support dual connectivity with NR and may share a commonfronthaul for LTE and NR.

The logical architecture of distributed RAN 200 may enable cooperationbetween and among TRPs 208, for example, within a TRP and/or across TRPsvia ANC 202. An inter-TRP interface may not be used.

Logical functions may be dynamically distributed in the logicalarchitecture of distributed RAN 200. As will be described in more detailwith reference to FIG. 5, the Radio Resource Control (RRC) layer, PacketData Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer,Medium Access Control (MAC) layer, and a Physical (PHY) layers may beadaptably placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202).

FIG. 3 illustrates an example physical architecture of a distributedRadio Access Network (RAN) 300, according to aspects of the presentdisclosure. A centralized core network unit (C-CU) 302 may host corenetwork functions. C-CU 302 may be centrally deployed. C-CU 302functionality may be offloaded (e.g., to advanced wireless services(AWS)), in an effort to handle peak capacity.

A centralized RAN unit (C-RU) 304 may host one or more ANC functions.Optionally, the C-RU 304 may host core network functions locally. TheC-RU 304 may have distributed deployment. The C-RU 304 may be close tothe network edge.

A DU 306 may host one or more TRPs (Edge Node (EN), an Edge Unit (EU), aRadio Head (RH), a Smart Radio Head (SRH), or the like). The DU may belocated at edges of the network with radio frequency (RF) functionality.

FIG. 4 illustrates example components of BS 110 and UE 120 (as depictedin FIG. 1), which may be used to implement aspects of the presentdisclosure. For example, antennas 452, processors 466, 458, 464, and/orcontroller/processor 480 of the UE 120 and/or antennas 434, processors420, 460, 438, and/or controller/processor 440 of the BS 110 may be usedto perform the various techniques and methods described herein andillustrated in FIGS. 7 and 8.

At the BS 110, a transmit processor 420 may receive data from a datasource 412 and control information from a controller/processor 440. Thecontrol information may be for the physical broadcast channel (PBCH),physical control format indicator channel (PCFICH), physical hybrid ARQindicator channel (PHICH), physical downlink control channel (PDCCH),group common PDCCH (GC PDCCH), etc. The data may be for the physicaldownlink shared channel (PDSCH), etc. The processor 420 may process(e.g., encode and symbol map) the data and control information to obtaindata symbols and control symbols, respectively. The processor 420 mayalso generate reference symbols, e.g., for the primary synchronizationsignal (PSS), secondary synchronization signal (SSS), and cell-specificreference signal (CRS). A transmit (TX) multiple-input multiple-output(MIMO) processor 430 may perform spatial processing (e.g., precoding) onthe data symbols, the control symbols, and/or the reference symbols, ifapplicable, and may provide output symbol streams to the modulators(MODs) 432 a through 432 t. Each modulator 432 may process a respectiveoutput symbol stream (e.g., for OFDM, etc.) to obtain an output samplestream. Each modulator may further process (e.g., convert to analog,amplify, filter, and upconvert) the output sample stream to obtain adownlink signal. Downlink signals from modulators 432 a through 432 tmay be transmitted via the antennas 434 a through 434 t, respectively.

At the UE 120, the antennas 452 a through 452 r may receive the downlinksignals from the base station 110 and may provide received signals tothe demodulators (DEMODs) in transceivers 454 a through 454 r,respectively. Each demodulator 454 may condition (e.g., filter, amplify,downconvert, and digitize) a respective received signal to obtain inputsamples. Each demodulator may further process the input samples (e.g.,for 01-DM, etc.) to obtain received symbols. A MIMO detector 456 mayobtain received symbols from all the demodulators 454 a through 454 r,perform MIMO detection on the received symbols if applicable, andprovide detected symbols. A receive processor 458 may process (e.g.,demodulate, deinterleave, and decode) the detected symbols, providedecoded data for the UE 120 to a data sink 460, and provide decodedcontrol information to a controller/processor 480.

On the uplink, at UE 120, a transmit processor 464 may receive andprocess data (e.g., for the physical uplink shared channel (PUSCH)) froma data source 462 and control information (e.g., for the physical uplinkcontrol channel (PUCCH) from the controller/processor 480. The transmitprocessor 464 may also generate reference symbols for a reference signal(e.g., for the sounding reference signal (SRS)). The symbols from thetransmit processor 464 may be precoded by a TX MIMO processor 466 ifapplicable, further processed by the demodulators in transceivers 454 athrough 454 r (e.g., for SC-FDM, etc.), and transmitted to the basestation 110. At the BS 110, the uplink signals from the UE 120 may bereceived by the antennas 434, processed by the modulators 432, detectedby a MIMO detector 436 if applicable, and further processed by a receiveprocessor 438 to obtain decoded data and control information sent by theUE 120. The receive processor 438 may provide the decoded data to a datasink 439 and the decoded control information to the controller/processor440.

The controllers/processors 440 and 480 may direct the operation at thebase station 110 and the UE 120, respectively. The processor 440 and/orother processors and modules at the BS 110 may perform or direct theexecution of processes for the techniques described herein. The memories442 and 482 may store data and program codes for BS 110 and UE 120,respectively. A scheduler 444 may schedule UEs for data transmission onthe downlink and/or uplink.

FIG. 5 illustrates a diagram 500 showing examples for implementing acommunications protocol stack, according to aspects of the presentdisclosure. The illustrated communications protocol stacks may beimplemented by devices operating in a wireless communication system,such as a 5G system (e.g., a system that supports uplink-basedmobility). Diagram 500 illustrates a communications protocol stackincluding a Radio Resource Control (RRC) layer 510, a Packet DataConvergence Protocol (PDCP) layer 515, a Radio Link Control (RLC) layer520, a Medium Access Control (MAC) layer 525, and a Physical (PHY) layer530. In various examples, the layers of a protocol stack may beimplemented as separate modules of software, portions of a processor orASIC, portions of non-collocated devices connected by a communicationslink, or various combinations thereof. Collocated and non-collocatedimplementations may be used, for example, in a protocol stack for anetwork access device (e.g., ANs, CUs, and/or DUs) or a UE.

A first option 505-a shows a split implementation of a protocol stack,in which implementation of the protocol stack is split between acentralized network access device (e.g., an ANC 202 in FIG. 2) anddistributed network access device (e.g., DU 208 in FIG. 2). In the firstoption 505-a, an RRC layer 510 and a PDCP layer 515 may be implementedby the central unit, and an RLC layer 520, a MAC layer 525, and a PHYlayer 530 may be implemented by the DU. In various examples the CU andthe DU may be collocated or non-collocated. The first option 505-a maybe useful in a macro cell, micro cell, or pico cell deployment.

A second option 505-b shows a unified implementation of a protocolstack, in which the protocol stack is implemented in a single networkaccess device. In the second option, RRC layer 510, PDCP layer 515, RLClayer 520, MAC layer 525, and PHY layer 530 may each be implemented bythe AN. The second option 505-b may be useful in, for example, a femtocell deployment.

Regardless of whether a network access device implements part or all ofa protocol stack, a UE may implement an entire protocol stack as shownin 505-c (e.g., the RRC layer 510, the PDCP layer 515, the RLC layer520, the MAC layer 525, and the PHY layer 530).

In LTE, the basic transmission time interval (TTI) or packet duration isthe 1 ms subframe. In NR, a subframe is still 1 ms, but the basic TTI isreferred to as a slot. A subframe contains a variable number of slots(e.g., 1, 2, 4, 8, 16, . . . slots) depending on the subcarrier spacing.The NR RB is 12 consecutive frequency subcarriers. NR may support a basesubcarrier spacing of 15 KHz and other subcarrier spacing may be definedwith respect to the base subcarrier spacing, for example, 30 kHz, 60kHz, 120 kHz, 240 kHz, etc. The symbol and slot lengths scale with thesubcarrier spacing. The CP length also depends on the subcarrierspacing.

FIG. 6 is a diagram showing an example of a frame format 600 for NR. Thetransmission timeline for each of the downlink and uplink may bepartitioned into units of radio frames. Each radio frame may have apredetermined duration (e.g., 10 ms) and may be partitioned into 10subframes, each of 1 ms, with indices of 0 through 9. Each subframe mayinclude a variable number of slots depending on the subcarrier spacing.Each slot may include a variable number of symbol periods (e.g., 7 or 14symbols) depending on the subcarrier spacing. The symbol periods in eachslot may be assigned indices. A mini-slot, which may be referred to as asub-slot structure, refers to a transmit time interval having a durationless than a slot (e.g., 2, 3, or 4 symbols).

Each symbol in a slot may indicate a link direction (e.g., DL, UL, orflexible) for data transmission and the link direction for each subframemay be dynamically switched. The link directions may be based on theslot format. Each slot may include DL/UL data as well as DL/UL controlinformation.

In NR, a synchronization signal (SS) block is transmitted. The SS blockincludes a PSS, a SSS, and a two symbol PBCH. The SS block can betransmitted in a fixed slot location, such as the symbols 0-3 as shownin FIG. 6. The PSS and SSS may be used by UEs for cell search andacquisition. The PSS may provide half-frame timing, the SS may providethe CP length and frame timing. The PSS and SSS may provide the cellidentity. The PBCH carries some basic system information, such asdownlink system bandwidth, timing information within radio frame, SSburst set periodicity, system frame number, etc. The SS blocks may beorganized into SS bursts to support beam sweeping. Further systeminformation such as, remaining minimum system information (RMSI), systeminformation blocks (SIB s), other system information (OSI) can betransmitted on a physical downlink shared channel (PDSCH) in certainsubframes.

In some circumstances, two or more subordinate entities (e.g., UEs) maycommunicate with each other using sidelink signals. Real-worldapplications of such sidelink communications may include public safety,proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V)communications, Internet of Everything (IoE) communications, IoTcommunications, mission-critical mesh, and/or various other suitableapplications. Generally, a sidelink signal may refer to a signalcommunicated from one subordinate entity (e.g., UE1) to anothersubordinate entity (e.g., UE2) without relaying that communicationthrough the scheduling entity (e.g., UE or BS), even though thescheduling entity may be utilized for scheduling and/or controlpurposes. In some examples, the sidelink signals may be communicatedusing a licensed spectrum (unlike wireless local area networks, whichtypically use an unlicensed spectrum).

A UE may operate in various radio resource configurations, including aconfiguration associated with transmitting pilots using a dedicated setof resources (e.g., a radio resource control (RRC) dedicated state,etc.) or a configuration associated with transmitting pilots using acommon set of resources (e.g., an RRC common state, etc.). Whenoperating in the RRC dedicated state, the UE may select a dedicated setof resources for transmitting a pilot signal to a network. Whenoperating in the RRC common state, the UE may select a common set ofresources for transmitting a pilot signal to the network. In eithercase, a pilot signal transmitted by the UE may be received by one ormore network access devices, such as an AN, or a DU, or portionsthereof. Each receiving network access device may be configured toreceive and measure pilot signals transmitted on the common set ofresources, and also receive and measure pilot signals transmitted ondedicated sets of resources allocated to the UEs for which the networkaccess device is a member of a monitoring set of network access devicesfor the UE. One or more of the receiving network access devices, or a CUto which receiving network access device(s) transmit the measurements ofthe pilot signals, may use the measurements to identify serving cellsfor the UEs, or to initiate a change of serving cell for one or more ofthe UEs.

Example Paging Design with Short Message Indicator

NR paging downlink control information (DCI) may include various typesof information, including short messages (e.g., 8 bit messages) and/orscheduling information. In some implementations, one or more bits withina DCI message may be used to indicate the presence of a short messageand/or scheduling information within the DCI message. For example, thefollowing is an example of how two short message indicator bits may beused in some implementations:

Bit field Short Message indicator 00 Reserved 01 Only schedulinginformation for Paging is present in the DCI 10 Only short message ispresent in the DCI 11 Both scheduling information for Paging and shortmessage are present in the DCI

When the short message indicator is not enabled, the DCI includesscheduling information for a PDSCH scrambled by the P-RNTI.Alternatively, when the short message indicator is enabled, thisindicates that there is no scheduling information for the PDSCHscrambled by the P-RNTI. In such a case, the network may repurpose theportion of the DCI otherwise used for scheduling for a short pagingmessage instead. The short paging message may include, for example, oneor more of: a system information (SI) update, commercial mobile alertsystem (CMAS) update, or earth quake and tsunami warning system (ETWS)update, to name a few examples. Notably, an RRC_CONNECTED UE may monitorfor an SI update notification during any paging occasion, and may not berequired to decode P-RNTI PDSCH unless specifically requested orindicated. This sort of system configuration may enable more efficientoperations. For example, UE power savings and better hardwareimplementation may be achieved because the UE may not have to overbudget for rare and/or unnecessary events such as simultaneous P-RNTIscrambled PDSCH with cell—radio network temporary identifier (C-RNTI)scrambled PDSCH.

Handling paging messages in a P-RNTI-scrambled PDSCH with one or moreshort messages in DCI may include several consideration. For example,for an SI update, the network may not need to simultaneously sendP-RNTI-scrambled PDSCH. Consequently, there may be no need to page UEsuntil they get an SI update to resolve the network configuration.

For commercial mobile alert system (CMAS) updates and earth quake andtsunami warning system (ETWS) updates, the network may delay and/orprioritize processing of various transmissions. For example, the networkmay send all short messages first, and then send any paging PDSCHmessages to UEs thereafter. Alternatively, the network may delay ETWSupdates or CMAS updates until all pages to UEs have been sent over thePDSCH.

Embodiments described herein present additional configurations for DCImessaging. For example, in a first implementation, a network maytransmit two DCI messages scrambled by one P-RNTI and a blind decodingconfiguration for UEs. One of the two DCI messages may be a shortmessage and the other may include scheduling information. A receivingIDLE UE may be configured to search for both DCIs, whereas anRRC_CONNECTED UE may be configured to search for the short message DCI,but may ignore the scheduling DCI message. In such a configuration,there is no additional complexity for the UE in searching for the DCImessages, but the network must be able to accommodate two paging DCIs.

In an alternative implementation, the network may transmit two DCImessages scrambled by two different P-RNTIs and a blind decodingconfiguration for UEs. As above, one of the two DCI messages may be ashort message and the other may include scheduling information. And asabove, a receiving IDLE UE may be configured to search for both DCIs,whereas an RRC_CONNECTED UE may be configured to search for the shortmessage DCI, but may ignore the scheduling DCI message. In thisalternative configuration, there is no additional complexity for the UEin searching for the DCI messages, but the UE may be able to prune basedon the different P-RNTIs, and as above, the network must be able toaccommodate two paging DCIs.

Embodiments described herein may implement alternative DCI format. Forexample, in a first implementation, a DCI may contain two types of shortmessages. In particular, the scheduling DCI reserved bits may bere-purposed as short message indicator bits, as described above, whichindicate the presence of, for example, an SI-update, a CMAS update, oran ETWS update.

In such cases, the UE may be prompted to get the updates from theSI-RNTI once received in DCI. Further, in such cases, short message DCImay have more information in the DCI regarding the SI-update or CMAS orETWS updates, which may be indicated through the same short messageindicator, or a new null resource allocation. In such implementations,the network may send one DCI message and leverage a short message formatdepending on the network's preference. Further, an RRC_CONNECTED UE maystill ignore scheduling information in scheduling DCI and read only theshort format message.

Another alternative DCI format may contain two short message indicatorbits that signal whether the UE is required to decode P-RNTI-scrambledPDSCH and drop C-RNTI-scrambled PDSCH. Thus, the network can send oneDCI message and leverage a short message format depending on thenetwork's preference. In this case, though, an RRC_CONNECTED UE may beconfigured to decode P-RNTI-scrambled PDSCH if indicated, and may ignoreC-RNTI-scrambled PDSCH if it is overlapping. Thus, in someimplementations, an RRC_CONNECTED UE may be configured to prioritize aP-RNTI-scrambled PDSCH whenever scheduling DCI is present, and drop anyC-RNTI-scrambled PDSCH which is simultaneously overlapping in time.

FIG. 7 illustrates example operations for a method 700 for wirelesscommunication by a user equipment (UE).

Method 700 begins at step 702 with receiving a paging downlink controlchannel comprising downlink control information, wherein the downlinkcontrol information comprises a first short message.

In some implementations, the downlink control information comprises afirst downlink control information message and a second downlink controlinformation message. In some implementations, the first downlink controlinformation message comprises the first short message, and the seconddownlink control information message comprises the schedulinginformation and a second short message.

Method 700 then proceeds to step 704 with processing the first shortmessage.

Method 700 then proceeds to step 706 with determining if the controlinformation further comprises scheduling information.

Method 700 then proceeds to step 708 with processing the schedulinginformation if the downlink control information comprises schedulinginformation and the UE is not in a connected state.

Method 700 then proceeds to step 710 with ignoring the schedulinginformation if the downlink control information comprises schedulinginformation and the UE is in a connected state.

In some examples, the connected state of the UE is a radio resourcecontrol (RRC)-connected state.

In some implementations, the first downlink control information messageand the second downlink control information message are scrambled by asame paging—radio network temporary identifier (P-RNTI).

In some implementations, the first downlink control information messageand the second downlink control information message are scrambled bydifferent paging—radio network temporary identifiers (P-RNTIs).

In some implementations, the second downlink control information messageschedules a physical downlink shared channel (PDSCH) scrambled with aP-RNTI.

In some implementations, the first short message comprises a shortpaging message that comprises one or more of: a system informationupdate, a commercial mobile alert system (CMAS) update, or an earthquake and tsunami warning system (ETWS) update.

In some implementations, the first downlink control information messagecomprises a first message format of a first bit length, and the seconddownlink control information message comprises a second format of asecond bit length. In some implementations, the second bit lengthcomprises a subset of bits that does not get used to schedule pagingPDSCH in the second downlink control information message.

In some implementations, the first downlink control information messagecomprises more bits associated with at least one of an SI update, a CMASupdate, or an ETWS update than the second downlink control informationmessage.

In some implementations, the connected state of the UE is an idle state,and method 700 further includes processing a second short message.

In some implementations, at least one of the first downlink controlinformation message or the second downlink control information messagecomprises a first indicator bit and a second indicator bit, and valuesof the first indicator bit and the second indicator bit are configuredto signal the UE to decode a P-RNTI-scrambled PDSCH and to drop acell—radio network temporary identifier (C-RNTI)-scrambled PDSCH.

FIG. 8 illustrates example operations for a method of wirelesscommunications 800 that may be performed by a network entity, inaccordance with aspects of the present disclosure.

Method 800 beings at step 802 with transmitting a first downlink controlinformation message on a paging downlink control channel, the firstdownlink control information message comprising a first short message.

Method 800 then proceeds to step 804 with transmitting a second downlinkcontrol information message on the paging downlink control channel, thesecond downlink control information message comprising the schedulinginformation and a second short message.

In some implementations, the first short message comprises a shortpaging message that comprises one or more of: a system informationupdate, a commercial mobile alert system (CMAS) update, or an earthquake and tsunami warning system (ETWS) update.

In some implementations, the second downlink control information messageschedules a physical downlink shared channel (PDSCH) scrambled with apaging—radio network temporary identifier (P-RNTI).

In further embodiments of methods 700 and 800, described above, two DCImessages may be provided that are scrambled by a P-RNTI. A first DCImessage may include one short message and the second DCI message may bea scheduling DCI message that includes scheduling information. In such acase, a network implementation may include having a network entity sendthe two DCI messages and the network entity may further send a blinddecoding configuration for a UE.

A UE may be configured for a different behaviors depending on, forexample, the state of the UE in addition during aspects of methods 700and 800.

For example, an IDLE UE may be configured to search for both DCImessages. If the IDLE UE search detects both DCI messages, then the IDLEUE may be configured to process both messages. If, on the other hand,the UE is an RRC_CONNECTED state, the UE will only search for a shortmessage within the DCI message. In such cases, if scheduling informationis found in the DCI message, the RRC_CONNECTED UE may be configured toignore the scheduling information.

In some examples of methods 700 and 800, different DCI messages may bescrambled with different P-RNTIs. The two DCI messages may include afirst DCI message that includes one short message, and a second DCImessage that includes scheduling information. In such cases, the networkimplementation may again include having a network entity send the twoDCI messages as well as a blind decoding configuration for a UE.

In some examples of methods 700 and 800, a first DCI format may be usedthat that comprises a first short message of a first length. Further, asecond format can used that comprises scheduling information and asecond short message of a second length, wherein in this example thesecond length denotes the length of the second short message and not thelength of the combined scheduling information and the second shortmessage. Thus, DCI messages can contain two types of short messages.

In some implementations, bits reserved for scheduling in a DCI messagemay be re-purposed for short indications of, for example, an SI-update,a CMAS update, or an ETWS update. In some implementations, the UE can beprompted to get these from the system information radio networktemporary identifier (SI-RNTI) once received in a DCI message.

In some cases, a short message within a DCI message of the first formatmay have more information regarding, for example, an SI-update, a CMASupdate, or an ETWS update as compared to a DCI message in the secondformat.

In some implementations, an indication through the same short messageindicator, or (new) null resource allocation may be provided. In somecases, a network implementation can include a network entity that cansend one DCI and leverage short message format depending on networkpreferences.

In some implementations, a UE may be configured such that in both IDLEand RRC_CONNECTED states, the UE reads both “detailed” short pagingmessages and scheduling information within a DCI message, along withreserved bits that contain “shortened” short paging message. AnRRC_CONNECTED UE may still ignore scheduling information in a DCImessage. In contrast, an IDLE UE may be configured to process both theshort message(s) and the scheduling information.

In another implementation, a DCI format may contain a short messageindicator bit and an additional indicator bit. The additional indicatorbit, or a patter based on the two bits, may signal that the UE isrequired to decode P-RNTI PDSCH and drop C-RNTI PDSCH. In someimplementations, bit usage can be consistent with a short messageindicator (i.e., ignored if short message is used). In someimplementations, a network can include a network entity that sends oneDCI message and leverages short message format.

In some implementations, an indicator field may be provided in a pagingDCI message that indicates the specific format of the paging DCImessage. For example, in some cases, the indicator may indicate that theformat of the paging DCI message includes only a paging message or itmay indicate the paging DCI message includes scheduling information aswell as a shorter paging message. In other cases, the indicator fieldmay indicate that the paging DCI message includes scheduling informationand a short paging message or the indicator field may indicate the DCImessage includes only the scheduling information and one or more unusedreserved bits.

In some implementations, an indicator field or bit(s) may also be a“null resource allocation” bit(s) that indicates the presence of eithera larger short paging message or P-RNTI PDSCH scheduling informationalong with a shorter short paging message that is conveyed in thereserved bits. Null resource allocation means the resource allocationbits of the DCI determine whether DCI contains the larger short pagingmessage or whether the DCI contains the P-RNTI PDSCH schedulinginformation and the shorter short paging message.

Thus, in the case where the indicator bit(s) is a null resourceallocation bit(s), the following may be provided. If the resourceallocation bits of the DCI signal valid resource allocation, then theDCI contains P-RNTI PDSCH scheduling information and a short pagingmessage. Alternatively, if resource allocation bits of the DCI signalinvalid resource allocation, then the DCI contains a larger short pagingmessage. In one or more cases, the resource allocation could denote timeor frequency allocation.

In other cases, the indicator bit can indicate other options. Forexample, in one or more implementations, the indicator bit may indicatethat the paging DCI message includes P-RNTI PDSCH scheduling informationand a shorter short paging message that is conveyed in reserved bits, orthe indictor bit may indicate that the paging DCI message includes onlythe P-RNTI PDSCH scheduling information. In this case, there may beunused reserved bits in the paging DCI message. In such a case, the UEmay treat the reserved bits of the DCI message as junk and/or simplyrecognize they are unused bits. In one or more cases, the idle UE canuse the indicator field to identify and read both scheduling informationand a shorter short paging message. A connected UE can use the indicatorfield to identify and read the shorter short paging message if it isconfigured and may use the indicator field to ignore the P-RNTI PDSCHscheduling information.

In some cases, an RRC_CONNECTED UE may be configured to decodeP-RNTI-scrambled PDSCH and may ignore C-RNTI-scrambled PDSCH if it issimultaneously overlapping.

In some implementations, RRC_CONNECTED UEs are configured to prioritizeP-RNTI-scrambled PDSCH whenever scheduling information is present in aDCI message, and drop any C-RNTI-scrambled PDSCH that is simultaneouslyoverlapping in time.

Aspects described above with respect to methods 700 and 800 may helpreduce hardware complexity for dealing with paging messages while a UEis in connected mode. This provides benefits of further systemflexibility while not compromising UE implementation.

FIG. 9 illustrates a communications device 900 that includes variouscomponents (e.g., corresponding to means-plus-function components)configured to perform operations for the techniques disclosed herein,such as the operations 700 depicted and described in FIG. 7.

In the depicted embodiments, communications device 900 includes aprocessing system 914 coupled to a transceiver 912. The transceiver 912is configured to transmit and receive signals for the communicationsdevice 900 via an antenna 920, such as the various signal describedherein. The processing system 914 may be configured to performprocessing functions for the communications device 900, includingprocessing signals received and/or to be transmitted by thecommunications device 900.

The processing system 914 includes a processor 908 coupled to acomputer-readable medium/memory 910 via a bus 924. In certain aspects,the computer-readable medium/memory 910 is configured to storeinstructions that when executed by processor 908, cause the processor908 to perform the operations illustrated in FIG. 7, or other operationsfor performing the various techniques discussed herein.

In certain aspects, processing system 914 further includes monitoringcomponent 902 for performing operations described herein. In someimplementations, monitoring component 902 may be configured to performthe operations illustrated at 702 in FIG. 7.

Additionally, processing system 914 includes a processing component 904for performing operations described herein. In some implementations,processing component 904 may be configured to performing the operationsillustrated at 704 and 708 in FIG. 7.

Further, the processing system 914 includes a determining component 906for performing operations described herein. In some implementations,processing component 906 may be configured to performing the operationsillustrated at 706 and 710 in FIG. 7.

Further, the processing system 914 includes a receiving component 916for performing operations described herein. In some implementations,processing component 906 may be configured to performing the operationsillustrated at 702 in FIG. 7.

Monitoring component 902, processing component 904, determiningcomponent 906, and receiving component 916 may be coupled to theprocessor 908 via bus 924. In certain aspects, the monitoring component902, processing component 904, determining component 906, and receivingcomponent 916 may be hardware circuits. In certain aspects, themonitoring component 902, processing component 904, determiningcomponent 906, and receiving component 916 may be software componentsthat are executed and run on processor 908.

FIG. 10 illustrates a communications device 1000 that may includevarious components (e.g., corresponding to means-plus-functioncomponents) configured to perform operations for the techniquesdisclosed herein, such as the operations illustrated in FIG. 8.

In this depicted embodiment, communications device 1000 includes aprocessing system 1014 coupled to a transceiver 1012. The transceiver1012 is configured to transmit and receive signals for thecommunications device 1000 via an antenna 1020, such as the varioussignal described herein. The processing system 1014 may be configured toperform processing functions for the communications device 1000,including processing signals received and/or to be transmitted by thecommunications device 1000.

The processing system 1014 includes a processor 1008 coupled to acomputer-readable medium/memory 1010 via a bus 1024. In certain aspects,the computer-readable medium/memory 1010 is configured to storeinstructions that when executed by processor 1008, cause the processor1008 to perform the operations 800 illustrated in FIG. 8, or otheroperations for performing the various techniques discussed herein.

In certain aspects, processing system 1014 further includes transmittingcomponent 1002 for performing operations described herein, such as theoperations illustrated at 802 and 804 in FIG. 8. Additionally,processing system 1014 includes receiving component 1004 for performingoperations described herein, such as the operations as described herein.The processing system 1014 further includes message forming component1006 for performing operations as described herein. Finally, processingsystem 1014 further includes scrambling component 1016 for performingoperations described herein.

Transmitting component 1002, receiving component 1004, message formingcomponent 1006, and scrambling component 1006 may be coupled to theprocessor 1008 via bus 1024. In certain aspects, the transmittingcomponent 1002, receiving component 1004, messaging forming component1006, and scrambling component 1016 may be hardware circuits. In certainaspects, the transmitting component 1002, receiving component 1004,message forming component 1006, and scrambling component 1016 may besoftware components that are executed and run on processor 1008.

EXAMPLE EMBODIMENTS

The following are example embodiments. Even if single claim dependenciesare indicated in the following examples, or in the claims below, allclaim dependencies, including multiple claim dependencies, are includedwithin the scope of the present disclosure.

Embodiment 1

a method for wireless communication by a user equipment (UE),comprising: monitoring for a paging downlink control channel comprisingdownlink control information, wherein the downlink control informationcomprises a first short message; processing the first short message;determining if the downlink control information further comprisesscheduling information; processing the scheduling information if thedownlink control information comprises scheduling information and the UEis not in a connected state; and ignoring the scheduling information ifthe downlink control information comprises scheduling information andthe UE is in a connected state.

Embodiment 2

The method of Embodiment 1, wherein: the downlink control informationcomprises a first downlink control information message and a seconddownlink control information message, the first downlink controlinformation message comprises the first short message, and the seconddownlink control information message comprises the schedulinginformation.

Embodiment 3

The method of Embodiment 2, where the second downlink controlinformation message further comprises a second short message.

Embodiment 4

The method of Embodiment 3, wherein the connected state of the UE is aradio resource control (RRC)-connected state.

Embodiment 5

The method of any of Embodiments 3-4, wherein the first downlink controlinformation message and the second downlink control information messageare scrambled by a same paging—radio network temporary identifier(P-RNTI).

Embodiment 6

The method of any of Embodiments 3-4, wherein the first downlink controlinformation message and the second downlink control information messageare scrambled by different paging—radio network temporary identifiers(P-RNTIs).

Embodiment 7

The method of any of Embodiment 3-6, wherein the second downlink controlinformation message schedules a physical downlink shared channel (PDSCH)scrambled with a P-RNTI.

Embodiment 8

The method of any of Embodiments 1-7, wherein the first short messagecomprises a short paging message that comprises one or more of: a systeminformation update, a commercial mobile alert system (CMAS) update, oran earth quake and tsunami warning system (ETWS) update.

Embodiment 9

The method of any of Embodiments 3-8, wherein: the first downlinkcontrol information message comprises a first message format of a firstbit length, and the second downlink control information messagecomprises a second format of a second bit length.

Embodiment 10

The method of Embodiment 9, wherein the second bit length comprises asubset of bits that does not get used to schedule paging PDSCH in in thesecond downlink control information message.

Embodiment 11

The method of any of Embodiments 9-10, wherein the first downlinkcontrol information message comprises more bits associated with at leastone of an SI update, a CMAS update, or an ETWS update than the seconddownlink control information message.

Embodiment 12

The method of any of Embodiments 3-11, wherein: the connected state ofthe UE is an idle state, and the method further includes processing thesecond short message.

Embodiment 13

The method of any of Embodiments 3-12, wherein: at least one of thefirst downlink control information message or the second downlinkcontrol information message comprises a first indicator bit and a secondindicator bit, and values of the first indicator bit and the secondindicator bit are configured to signal the UE to decode aP-RNTI-scrambled PDSCH and to drop a cell—radio network temporaryidentifier (C-RNTI)-scrambled PDSCH.

Embodiment 14

The method of Embodiment 1, wherein the downlink control informationcomprises a first indicator field that indicates a format of thedownlink control information.

Embodiment 15

The method of Embodiment 14, wherein: the first indicator fieldcomprises resource allocation bits, the resource allocation bitsindicate the first format comprises a first short message of a firstlength if the resource allocation bits signal an invalid resourceallocation, and the resource allocation bits indicate a second formatcomprises the scheduling information and a second short message of asecond length if the resource allocation bits signal a valid resourceallocation.

Embodiment 16

The method of Embodiment 15, wherein the resource allocation bitsindicate at least one of time or frequency allocation.

Embodiment 17

The method of Embodiment 1, wherein the downlink control informationcomprises a first indicator field that indicates at least one of a firstor second format, the first format comprises the scheduling informationand one or more unused reserved bits, and the second format comprisesthe scheduling information and a second short message.

Embodiment 18

The method of Embodiment 1, wherein the downlink control informationcomprises a first indicator field and a second indicator field.

Embodiment 19

A user equipment (UE), comprising: a memory comprisingcomputer-executable instructions; a processor configured to execute thecomputer-executable instructions and cause the UE to: monitor for apaging downlink control channel comprising downlink control information,wherein the downlink control information comprises a first shortmessage; process the first short message; and determine if the downlinkcontrol information further comprises scheduling information; processthe scheduling information if the downlink control information comprisesscheduling information and the UE is not in a connected state; andignore the scheduling information if the downlink control informationcomprises scheduling information and the UE is in a connected state.

Embodiment 20

The UE of Embodiment 19, wherein: the downlink control informationcomprises a first downlink control information message and a seconddownlink control information message, the first downlink controlinformation message comprises the first short message, and the seconddownlink control information message comprises the schedulinginformation and a second short message.

Embodiment 21

The UE of Embodiment 20, wherein the connected state of the UE is aradio resource control (RRC)-connected state.

Embodiment 22

The UE of any of Embodiments 20-21, wherein the first downlink controlinformation message and the second downlink control information messageare scrambled by a same paging—radio network temporary identifier(P-RNTI).

Embodiment 23

The UE of an of Embodiments 20-21, wherein the first downlink controlinformation message and the second downlink control information messageare scrambled by different paging—radio network temporary identifiers(P-RNTIs).

Embodiment 24

The UE of any of Embodiments 20-23, wherein the second downlink controlinformation message schedules a physical downlink shared channel (PDSCH)scrambled with a P-RNTI.

Embodiment 25

The UE of any of Embodiment 19-24, wherein the first short messagecomprises a short paging message that comprises one or more of: a systeminformation update, a commercial mobile alert system (CMAS) update, oran earth quake and tsunami warning system (ETWS) update.

Embodiment 26

The UE of any of Embodiments 20-25, wherein: the first downlink controlinformation message comprises a first message format of a first bitlength, and the second downlink control information message comprises asecond format of a second bit length.

Embodiment 27

The UE of Embodiment 26, wherein the second bit length comprises asubset of bits that does not get used to schedule paging PDSCH in in thesecond downlink control information message.

Embodiment 28

The UE of any of Embodiments 26-27, wherein the first downlink controlinformation message comprises more bits associated with at least one ofan SI update, a CMAS update, or an ETWS update than the second downlinkcontrol information message.

Embodiment 29

The UE of any of Embodiments 26-2328 wherein: the connected state of theUE is an idle state, and the processor is further configured to causethe UE to: process the second short message.

Embodiment 30

The UE of any of Embodiments 20-29, wherein: at least one of the firstdownlink control information message or the second downlink controlinformation message comprises a first indicator bit and a secondindicator bit, and values of the first indicator bit and the secondindicator bit are configured to signal the UE to decode aP-RNTI-scrambled PDSCH and to drop a cell—radio network temporaryidentifier (C-RNTI)-scrambled PDSCH.

Embodiment 31

A user equipment (UE), comprising: means for monitoring for a pagingdownlink control channel comprising downlink control information,wherein the downlink control information comprises a first shortmessage; means for processing the first short message; means fordetermining if the downlink control information further comprisesscheduling information; means processing the scheduling information ifthe downlink control information comprises scheduling information andthe UE is not in a connected state; and means for ignoring thescheduling information if the downlink control information comprisesscheduling information and the UE is in a connected state.

Embodiment 32

The UE of Embodiment 31, wherein: the downlink control informationcomprises a first downlink control information message and a seconddownlink control information message, the first downlink controlinformation message comprises the first short message, and the seconddownlink control information message comprises the schedulinginformation and a second short message.

Embodiment 33

The UE of Embodiment 32, wherein: the first short message comprises ashort paging message that comprises one or more of: a system informationupdate, a commercial mobile alert system (CMAS) update, or an earthquake and tsunami warning system (ETWS) update, and the second downlinkcontrol information message schedules a physical downlink shared channel(PDSCH) scrambled with a P-RNTI.

Embodiment 34

A method for wireless communication by a network, comprising:transmitting a first downlink control information message on a pagingdownlink control channel, the first downlink control information messagecomprising a first short message; and transmitting a second downlinkcontrol information message on the paging downlink control channel, thesecond downlink control information message comprising schedulinginformation.

Embodiment 35

The method of Embodiment 34, wherein the second downlink controlinformation message further comprises a second short message.

Embodiment 36

The method of Embodiment 35, wherein the first short message comprises ashort paging message that comprises one or more of: a system informationupdate, a commercial mobile alert system (CMAS) update, or an earthquake and tsunami warning system (ETWS) update.

Embodiment 37

The method of Embodiment 36, wherein the second downlink controlinformation message schedules a physical downlink shared channel (PDSCH)scrambled with a paging—radio network temporary identifier (P-RNTI).

The methods disclosed herein comprise one or more steps or actions forachieving the methods. The method steps and/or actions may beinterchanged with one another without departing from the scope of theclaims. In other words, unless a specific order of steps or actions isspecified, the order and/or use of specific steps and/or actions may bemodified without departing from the scope of the claims.

As used herein, a phrase referring to “at least one of” a list of itemsrefers to any combination of those items, including single members. Asan example, “at least one of: a, b, or c” is intended to cover a, b, c,a-b, a-c, b-c, and a-b-c, as well as any combination with multiples ofthe same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b,b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

As used herein, the term “determining” encompasses a wide variety ofactions. For example, “determining” may include calculating, computing,processing, deriving, investigating, looking up (e.g., looking up in atable, a database or another data structure), ascertaining and the like.Also, “determining” may include receiving (e.g., receiving information),accessing (e.g., accessing data in a memory) and the like. Also,“determining” may include resolving, selecting, choosing, establishingand the like.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language of the claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Unless specifically statedotherwise, the term “some” refers to one or more. All structural andfunctional equivalents to the elements of the various aspects describedthroughout this disclosure that are known or later come to be known tothose of ordinary skill in the art are expressly incorporated herein byreference and are intended to be encompassed by the claims. Moreover,nothing disclosed herein is intended to be dedicated to the publicregardless of whether such disclosure is explicitly recited in theclaims. No claim element is to be construed under the provisions of 35U.S.C. § 112(f) unless the element is expressly recited using the phrase“means for” or, in the case of a method claim, the element is recitedusing the phrase “step for.”

The various operations of methods described above may be performed byany suitable means capable of performing the corresponding functions.The means may include various hardware and/or software component(s)and/or module(s), including, but not limited to a circuit, anapplication specific integrated circuit (ASIC), or processor. Generally,where there are operations illustrated in figures, those operations mayhave corresponding counterpart means-plus-function components. Forexample, operations 700 illustrated in FIG. 7 and operations 800illustrated in FIG. 8 correspond to means illustrated in FIG. 9 andmeans illustrated in FIG. 10, respectively.

For example, means for transmitting and/or means for receiving maycomprise one or more of a transmit processor 420, a TX MIMO processor430, a receive processor 438, or antenna(s) 434 of the base station 110and/or the transmit processor 464, a TX MIMO processor 466, a receiveprocessor 458, or antenna(s) 452 of the user equipment 120.Additionally, means for monitoring, means for, processing, means fordetermining, means for prioritizing, and/or means for providing maycomprise one or more processors, such as the controller/processor 440 ofthe base station 110 and/or the controller/processor 480 of the userequipment 120.

The various illustrative logical blocks, modules and circuits describedin connection with the present disclosure may be implemented orperformed with a general purpose processor, a digital signal processor(DSP), an application specific integrated circuit (ASIC), a fieldprogrammable gate array (FPGA) or other programmable logic device (PLD),discrete gate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any commercially available processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

If implemented in hardware, an example hardware configuration maycomprise a processing system in a wireless node. The processing systemmay be implemented with a bus architecture. The bus may include anynumber of interconnecting buses and bridges depending on the specificapplication of the processing system and the overall design constraints.The bus may link together various circuits including a processor,machine-readable media, and a bus interface. The bus interface may beused to connect a network adapter, among other things, to the processingsystem via the bus. The network adapter may be used to implement thesignal processing functions of the PHY layer. In the case of a userterminal 120 (see FIG. 1), a user interface (e.g., keypad, display,mouse, joystick, etc.) may also be connected to the bus. The bus mayalso link various other circuits such as timing sources, peripherals,voltage regulators, power management circuits, and the like, which arewell known in the art, and therefore, will not be described any further.The processor may be implemented with one or more general-purpose and/orspecial-purpose processors. Examples include microprocessors,microcontrollers, DSP processors, and other circuitry that can executesoftware. Those skilled in the art will recognize how best to implementthe described functionality for the processing system depending on theparticular application and the overall design constraints imposed on theoverall system.

If implemented in software, the functions may be stored or transmittedover as one or more instructions or code on a computer readable medium.Software shall be construed broadly to mean instructions, data, or anycombination thereof, whether referred to as software, firmware,middleware, microcode, hardware description language, or otherwise.Computer-readable media include both computer storage media andcommunication media including any medium that facilitates transfer of acomputer program from one place to another. The processor may beresponsible for managing the bus and general processing, including theexecution of software modules stored on the machine-readable storagemedia. A computer-readable storage medium may be coupled to a processorsuch that the processor can read information from, and write informationto, the storage medium. In the alternative, the storage medium may beintegral to the processor. By way of example, the machine-readable mediamay include a transmission line, a carrier wave modulated by data,and/or a computer readable storage medium with instructions storedthereon separate from the wireless node, all of which may be accessed bythe processor through the bus interface. Alternatively, or in addition,the machine-readable media, or any portion thereof, may be integratedinto the processor, such as the case may be with cache and/or generalregister files. Examples of machine-readable storage media may include,by way of example, RAM (Random Access Memory), flash memory, ROM (ReadOnly Memory), PROM (Programmable Read-Only Memory), EPROM (ErasableProgrammable Read-Only Memory), EEPROM (Electrically ErasableProgrammable Read-Only Memory), registers, magnetic disks, opticaldisks, hard drives, or any other suitable storage medium, or anycombination thereof. The machine-readable media may be embodied in acomputer-program product.

A software module may comprise a single instruction, or manyinstructions, and may be distributed over several different codesegments, among different programs, and across multiple storage media.The computer-readable media may comprise a number of software modules.The software modules include instructions that, when executed by anapparatus such as a processor, cause the processing system to performvarious functions. The software modules may include a transmissionmodule and a receiving module. Each software module may reside in asingle storage device or be distributed across multiple storage devices.By way of example, a software module may be loaded into RAM from a harddrive when a triggering event occurs. During execution of the softwaremodule, the processor may load some of the instructions into cache toincrease access speed. One or more cache lines may then be loaded into ageneral register file for execution by the processor. When referring tothe functionality of a software module below, it will be understood thatsuch functionality is implemented by the processor when executinginstructions from that software module.

Also, any connection is properly termed a computer-readable medium. Forexample, if the software is transmitted from a website, server, or otherremote source using a coaxial cable, fiber optic cable, twisted pair,digital subscriber line (DSL), or wireless technologies such as infrared(IR), radio, and microwave, then the coaxial cable, fiber optic cable,twisted pair, DSL, or wireless technologies such as infrared, radio, andmicrowave are included in the definition of medium. Disk and disc, asused herein, include compact disc (CD), laser disc, optical disc,digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disksusually reproduce data magnetically, while discs reproduce dataoptically with lasers. Thus, in some aspects computer-readable media maycomprise non-transitory computer-readable media (e.g., tangible media).In addition, for other aspects computer-readable media may comprisetransitory computer-readable media (e.g., a signal). Combinations of theabove should also be included within the scope of computer-readablemedia.

Thus, certain aspects may comprise a computer program product forperforming the operations presented herein. For example, such a computerprogram product may comprise a computer-readable medium havinginstructions stored (and/or encoded) thereon, the instructions beingexecutable by one or more processors to perform the operations describedherein. For example, instructions for performing the operationsdescribed herein and illustrated in FIGS. 7 and 8.

Further, it should be appreciated that modules and/or other appropriatemeans for performing the methods and techniques described herein can bedownloaded and/or otherwise obtained by a user terminal and/or basestation as applicable. For example, such a device can be coupled to aserver to facilitate the transfer of means for performing the methodsdescribed herein. Alternatively, various methods described herein can beprovided via storage means (e.g., RAM, ROM, a physical storage mediumsuch as a compact disc (CD) or floppy disk, etc.), such that a userterminal and/or base station can obtain the various methods uponcoupling or providing the storage means to the device. Moreover, anyother suitable technique for providing the methods and techniquesdescribed herein to a device can be utilized.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the methods and apparatus described above without departingfrom the scope of the claims.

What is claimed is:
 1. A method for wireless communication by a userequipment (UE), comprising: monitoring for a paging downlink controlchannel comprising downlink control information, wherein the downlinkcontrol information comprises a first downlink control informationmessage with a first short message and a second downlink controlinformation message with scheduling information, and wherein at leastone of the first downlink control information message or the seconddownlink control information message comprises a first indicator bit anda second indicator bit that are configured to signal the UE to decode aP-RNTI-scrambled Physical Downlink Shared Channel (PDSCH) instead of acell radio network temporary identifier (C-RNTI)-scrambled PDSCH;processing the first short message; processing the schedulinginformation if the UE is not in a connected state; and ignoring thescheduling information if the UE is in a connected state.
 2. The methodof claim 1, where the second downlink control information messagefurther comprises a second short message.
 3. The method of claim 2,wherein the connected state of the UE is a radio resource control(RRC)-connected state.
 4. The method of claim 2, wherein the firstdownlink control information message and the second downlink controlinformation message are scrambled by a same paging radio networktemporary identifier (P-RNTI).
 5. The method of claim 2, wherein thefirst downlink control information message and the second downlinkcontrol information message are scrambled by different paging—radionetwork temporary identifiers (P-RNTIs).
 6. The method of claim 2,wherein the second downlink control information message schedules aphysical downlink shared channel (PDSCH) scrambled with a P-RNTI.
 7. Themethod of claim 2, wherein: the first downlink control informationmessage comprises a first message format of a first bit length, and thesecond downlink control information message comprises a second format ofa second bit length.
 8. The method of claim 7, wherein the second bitlength comprises a subset of bits that does not get used to schedulepaging PDSCH in in the second downlink control information message. 9.The method of claim 7, wherein the first downlink control informationmessage comprises more bits associated with at least one of an SIupdate, a CMAS update, or an ETWS update than the second downlinkcontrol information message.
 10. The method of claim 7, wherein: theconnected state of the UE is an idle state, and the method furtherincludes processing the second short message.
 11. The method of claim 1,wherein the first short message comprises a short paging message thatcomprises one or more of: a system information update, a commercialmobile alert system (CMAS) update, or an earth quake and tsunami warningsystem (ETWS) update.
 12. A user equipment (UE), comprising: a memorycomprising computer-executable instructions; a processor configured toexecute the computer-executable instructions and cause the UE to:monitor for a paging downlink control channel comprising downlinkcontrol information, wherein the downlink control information comprisesa first downlink control information message with a first short messageand a second downlink control information message with schedulinginformation, and wherein at least one of the first downlink controlinformation message or the second downlink control information messagecomprises a first indicator bit and a second indicator bit that areconfigured to signal the UE to decode a P-RNTI-scrambled PhysicalDownlink Shared Channel (PDSCH) instead of a cell—radio networktemporary identifier (C-RNTI)-scrambled PDSCH; process the first shortmessage; and process the scheduling information if the UE is not in aconnected state; and ignore the scheduling information if the UE is in aconnected state.
 13. The UE of claim 12, wherein: the second downlinkcontrol information message comprises the scheduling information and asecond short message.
 14. The UE of claim 13, wherein the connectedstate of the UE is a radio resource control (RRC)-connected state. 15.The UE of claim 13, wherein the first downlink control informationmessage and the second downlink control information message arescrambled by a same paging—radio network temporary identifier (P-RNTI).16. The UE of claim 13, wherein the first downlink control informationmessage and the second downlink control information message arescrambled by different paging—radio network temporary identifiers(P-RNTIs).
 17. The UE of claim 13, wherein the second downlink controlinformation message schedules a physical downlink shared channel (PDSCH)scrambled with a P-RNTI.
 18. The UE of claim 13, wherein: the firstdownlink control information message comprises a first message format ofa first bit length, and the second downlink control information messagecomprises a second format of a second bit length.
 19. The UE of claim18, wherein the second bit length comprises a subset of bits that doesnot get used to schedule paging PDSCH in the second downlink controlinformation message.
 20. The UE of claim 18, wherein the first downlinkcontrol information message comprises more bits associated with at leastone of an SI update, a CMAS update, or an ETWS update than the seconddownlink control information message.
 21. The UE of claim 18, wherein:the connected state of the UE is an idle state, and the processor isfurther configured to cause the UE to: process the second short message.22. The UE of claim 12, wherein the first short message comprises ashort paging message that comprises one or more of: a system informationupdate, a commercial mobile alert system (CMAS) update, or an earthquake and tsunami warning system (ETWS) update.
 23. A user equipment(UE), comprising: means for monitoring for a paging downlink controlchannel comprising downlink control information, wherein the downlinkcontrol information comprises a first downlink control informationmessage with a first short message and a second downlink controlinformation message with scheduling information, and wherein at leastone of the first downlink control information message or the seconddownlink control information message comprises a first indicator bit anda second indicator bit that are configured to signal the UE to decode aP-RNTI-scrambled Physical Downlink Shared Channel (PDSCH) instead of acell—radio network temporary identifier (C-RNTI)-scrambled PDSCH; meansfor processing the first short message; means for processing thescheduling information if the the UE is not in a connected state; andmeans for ignoring the scheduling information if the UE is in aconnected state.
 24. The UE of claim 23, wherein: the second downlinkcontrol information message comprises the scheduling information and asecond short message.
 25. The UE of claim 24, wherein: the first shortmessage comprises a short paging message that comprises one or more of:a system information update, a commercial mobile alert system (CMAS)update, or an earth quake and tsunami warning system (ETWS) update, andthe second downlink control information message schedules a physicaldownlink shared channel (PDSCH) scrambled with a P-RNTI.
 26. A methodfor wireless communication by a network, comprising: transmitting afirst downlink control information message on a paging downlink controlchannel, the first downlink control information message comprising afirst short message; and transmitting a second downlink controlinformation message on the paging downlink control channel, the seconddownlink control information message comprising scheduling information,wherein at least one of the first downlink control information messageor the second downlink control information message comprises a firstindicator bit and a second indicator bit that are configured to signal aUser Equipment (UE) to decode a P-RNTI-scrambled Physical DownlinkShared Channel (PDSCH) instead of a cell—radio network temporaryidentifier (C-RNTI)-scrambled PDSCH.
 27. The method of claim 26, whereinthe second downlink control information message further comprises asecond short message.
 28. The method of claim 27, wherein the firstshort message comprises a short paging message that comprises one ormore of: a system information update, a commercial mobile alert system(CMAS) update, or an earth quake and tsunami warning system (ETWS)update.
 29. The method of claim 28, wherein the second downlink controlinformation message schedules a physical downlink shared channel (PDSCH)scrambled with a paging—radio network temporary identifier (P-RNTI).